Spring intended for making an electrical connection

Abstract

This spring is made of an elastic leaf bent in such a way as to exhibit a pressing branch ( 4 ) and a moving branch ( 6 ) which are connected by an elastic arc ( 8 ) to the pressing branch, an opening ( 18 ) being made in the moving branch near its free end and being intended to accommodate an end of the conductor that is to be connected. The opening ( 18 ) transversely has a variable width, this width being greater at the end nearest the free end of the moving branch ( 6 ).

What is claimed is:  
     
       1. A spring made of an elastic leaf bent in such a way as to exhibit a pressing branch ( 4 ) and a moving branch ( 6 ) which are connected by an elastic arc ( 8 ), an opening ( 18 ) being made in the moving branch near a free end of the moving branch wherein part of the opening ( 18 ) transversely has a variable width that is greater at an end nearest the free end of the moving branch ( 6 ), a current supply rail ( 10 ) is provided in pressing contact with the pressing branch and includes a portion that extends through the opening and is biased against the free end of the moving branch, the portion having a transverse width sized for travel through at least a portion of the opening to define a conductor receiving opening between the current supply rail and the free end of the moving branch that also has a variable transverse width. 
     
     
       2. The spring according to  claim 1 , wherein the opening ( 18 ) has an elongate trapezoidal shape. 
     
     
       3. The spring according to  claim 1 , wherein the opening ( 18 ) exhibits two regions of different widths, connected by a connecting region. 
     
     
       4. The spring according to  claim 3 , wherein the connecting region has an arcuate circular contour and when the conductor is of a maximum size and is introduced into the opening, the conductor hugs the contour of the connecting region.